51416712991 has 16 divisors (see below), whose sum is σ = 62234195200. Its totient is φ = 41495753088.

The previous prime is 51416712989. The next prime is 51416713043. The reversal of 51416712991 is 19921761415.

It is a cyclic number.

It is not a de Polignac number, because 51416712991 - 2¹ = 51416712989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51416712901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1164186 + ... + 1207543.

It is an arithmetic number, because the mean of its divisors is an integer number (3889637200).

Almost surely, 2^51416712991 is an apocalyptic number.

51416712991 is a deficient number, since it is larger than the sum of its proper divisors (10817482209).

51416712991 is a wasteful number, since it uses less digits than its factorization.

51416712991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371918.

The product of its digits is 136080, while the sum is 46.

The spelling of 51416712991 in words is "fifty-one billion, four hundred sixteen million, seven hundred twelve thousand, nine hundred ninety-one".